Phil Cook <phi### [at] nospamrocainfreeservecouk> wrote:
> If they were travelling at the same speed I'd have thought that the  
> shortening of both track and train would be proportional from the view of  
> the other train?

  The trains travel at the same speed (in relation to the track) but in
opposite directions. Thus from the POV of one of the trains the other
train is approaching faster than the double track.

-- 
                                                          - Warp

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